I may have to get a 68RFE in my new truck.

[Stuart Carter Brandt]

I set the front tires at 80 psi today and they're already up to 90 after about 20 miles I don't know is that too much if the cold pressure is at 80 in the front then they it can almost probably go 292 or something like that is that okay I was just curious guys all right in the backs are fine the Baxter it 49 right now the back tire is I did not say the Baxter I said the back tires are at 49 right now the two dually tires.

 

[dieselshadow]

As been said here before Stuart, it's the COLD pressure you need to be concerned with. The tire manufacturers know the tires heat up and cause the pressure to increase. Being aware of that and knowing what the normal warm tire pressures are is a good thing, but cold is what you set them to.

For your setup 80 front, 45 rear cold, then warm 90(ish) front and 50(ish) rear seems to be your norm. The warm pressures will change with road and ambient temps as well with speed and load. As long as you compensate for load changes and adjust cold pressures for the appropriate load/pressure chart, again, you'll be all set.

 

[Cummins12V98]

^^^^^ YUP YUP ^^^^^

 

[dieselshadow]

I'll add that when I tow, anytime I stop, I will feel-up all my tires. If you can't leave your hand on the tire for less than 5 seconds, there's an issue brewing. Trailer hubs are also checked, but they can get warmer and be normal. If they are all roughly the same temp, then things are running well. Little things like this can prevent a roadside issue.

I've caught a trailer tire ready to pop because of this little habit. I was fully loaded running about 75mph in the heat of the summer crossing AR with a load of tractors on the trailer. Changed to my spare at my fuel stop. All was good. Emergency avoided.

 

[TFucili]

I'd be more interested in getting rid of those Nexens. I swapped tires the same day I picked my truck up and sold the Nexens.

 

[Cummins12V98]

I'd be more interested in getting rid of those Nexens. I swapped tires the same day I picked my truck up and sold the Nexens.

ABSOLUTELY!!! I sold mine first call on CL for $650 and had a set of Michelins waiting for me when my truck came in.

 

[Jim W]

Stuart;
I have been following this thread on and off and I have to ask and it may have been asked or posted! But I have to ask what does the tire placard state for your front tire air pressure? The reason I am asking is 80 PSI for the front tires seems high to me! I thinking the front tires should be around 60PSI to support a loaded GAWR of 5,500 LBS.

Now I believe you have stated that the truck and trailer have been weighed on a post in this thread, correct? if so, what was the front axle weight when loaded?

Very little of the towing load will be transferred to the front axle. As an example for my truck my front axle load for all three of my 5er's have never exceeded 4,940 LBS max weight. My trucks rated GAWR for the front is 5,200 LBS and 60 PSI is more than enough to support this load with my tires.

Now from an engineering point of view; over-inflation of the tire is just as dangerous as under-inflation. The tire in either condition is not making full contact with the road surface. With the tire wearing in certain spots and not fully across the surface of the tire. Another thing that can happen in over-inflation/ under-inflation condition is the tire can easily hydroplane in wet conditions since the full contact surface is not maintained.

I am not a big fan of TPMS! Why? Because the average user does not understand the ramification of all of the information being provided by these systems. Such as tire temperature and air pressure increases as the tire heats up do to rolling resistance. They become very concerned that the tire temps/air pressure have increase and all of a sudden this is a concern. So, what do they want to do is lower the air pressure so, as to prevent the tire from over heating or rising in tire pressure! This is normal process and the tire engineers have taken this into consideration. The tires are designed for this increase as long as the tire is maintained at the proper air pressure to support the tire load. This is why I refer to the tire inflation load charts provided by the tire manufacture. This is also available in the TIRE and Rim Association manual that is published each year!

 

[Stuart Carter Brandt]

I understand about the tires but the WIFE says no new tires they only have 7000 miles on them and if you look at the above picture the rear tires look a bit flat on the ground but thats a shadow they barely look like they have any weight on them at all, I know one thing the trailer tires do get hot but not too hot to touch.

 

[Stuart Carter Brandt]

Here it the last scale weight and I think you can figure it out?????





#ad

 

[Cummins12V98]

Door jamb says 80psi front. Look at the chart and add 5psi plus 5 for outside tire wear and he is right on with 80psi. Amy less and he will wear the hell out of his fronts.

 

[Cummins2014]

I'd be more interested in getting rid of those Nexens. I swapped tires the same day I picked my truck up and sold the Nexens.

Whats the problem with the Nexens, although my OE Firestone Transforce tires were crap as far as wearing , I still ran them until they were wore out.

 

[TFucili]

Whats the problem with the Nexens, although my OE Firestone Transforce tires were crap as far as wearing , I still ran them until they were wore out.

Failure at low miles. Tread separation, belt failures, ply separation, etc. The Transforces on my '15 wore out so fast I would have been dollars ahead to have sold them as take-offs. Pure garbage, but at least they don't have a reputation for catastrophic failures. The Nexens do.

 

[Cummins2014]

Failure at low miles. Tread separation, belt failures, ply separation, etc. The Transforces on my '15 wore out so fast I would have been dollars ahead to have sold them as take-offs. Pure garbage, but at least they don't have a reputation for catastrophic failures. The Nexens do.

Just curious, I got just shy of 30K out of the Firestone's , thats the second set of Firestone's I have had on a new truck, that didn't wear well. I was always amazed at the few that do rave about those Firestone Transforce tires .

 

[TFucili]

Just curious, I got just shy of 30K out of the Firestone's , thats the second set of Firestone's I have had on a new truck, that didn't wear well. I was always amazed at the few that do rave about those Firestone Transforce tires .

You did better than me. They were within a whisker of the wear bars at @15K miles. You could literally see them melting away. The prevailing thought is that the OEM tire is different than the "real" Transforce. All I know is Firestone put their name on the side, and I'll not own another.

 

[Cummins2014]

I know nothing about DRW, my truck SRW calls for 60 psi, which I run on the front all the time, 80 psi rear when towing the fifth wheel , 45-50 psi when empty. What makes the difference on DRW for 80 psi, type of tire ,size , weight ????

 

[Cummins2014]

You did better than me. They were within a whisker of the wear bars at @15K miles. You could literally see them melting away. The prevailing thought is that the OEM tire is different than the "real" Transforce. All I know is Firestone put their name on the side, and I'll not own another.

It seemed most were getting 25-30K out of them, not great for sure .You went thru them pretty fast. I tow like 30 percent of the time. No I am no fan of Firestone, nor Michelin .

 

[dieselshadow]

Tire size is the major factor. Different tires call for different pressures when exposed to the same load.

 

[Stuart Carter Brandt]

Aint no way I would run my FRONT tires at 60psi they would get so hot they would blow out I have over 5400 pound on my fronts aint no way and man if you blow a front watch OUT at 70mph.

 

[Stuart Carter Brandt]

Okay boys it seems we may have a problem the rears are at 5150 151 and 50 and the front right 95 isn't that too high I think it may be alright well here's a picture let me know guys that's really high 95 on the fronts.I am looking at the temperature right now in his 85° so man that's a lot of PS I change from 52° this morning to 83 and the pressure from whatever it was this morning I think it would I set up at 80 now they're at 95 PSI at 15 psi for what I said 15 psi is a lot wow.

 

[sag2]

Okay boys it seems we may have a problem the rears are at 5150 151 and 50 and the front right 95 isn't that too high I think it may be alright well here's a picture let me know guys that's really high 95 on the fronts.I am looking at the temperature right now in his 85° so man that's a lot of PS I change from 52° this morning to 83 and the pressure from whatever it was this morning I think it would I set up at 80 now they're at 95 PSI at 15 psi for what I said 15 psi is a lot wow.

No offense, but your a little slow to catch on.

DO NOT BE CONCERNED WITH THE HOT PRESSURE

As has been said many times already, set them to the placard pressure (COLD) and quit looking at the cluster. It's OK to set the rears different than the placard if the load chart says you can for your rear axle weight.